Showing posts with label fossil fuels. Show all posts
Showing posts with label fossil fuels. Show all posts

Monday, February 29, 2016

The great dilemma that is agriculture! Balancing between production and pollution

"Food insecurity" is a subject talked about very often because of two critical factors-population explosion and progressive reduction of food crop yield attributed by many to the global warming phenomenon. During the last 10 years frequent droughts and floods in different parts of the world have adversely affected agricultural out put significantly. Though technologies are continuously being developed and deployed to achieve increased yields, farmers in most undeveloped, under developed and developing countries still remain impoverished due to economic factors. In a country like India farmers are choosing the route of suicide to get them relieved from the unbearable burden of life. Recent climate talks COP21 (Conference of Parties to the 1997 Kyoto protocol ) that took place in Paris in November 2015 were concerned more with global warming due to uncontrolled green house gas emissions by all countries irrespective of their economic status a small but significant step was taken to bring focus on the food security in the world in the coming years and a realization seems to be dawning on wise people that climate change is intimately linked to food production and unless it is tackled there is no hope for survival of the human race. The ambitious target of reducing global warming and restricting global warming by not more than 2C by achieving zero net anthropogenic green house gas emissions by the second half of this century. was a bold decision. These decisions are to be given legal frame work of agreement between April 2016 and April 2017 in New York aas per the Paris agreement. Some of the decisions arrived at the Paris conference can have far reaching implications for all the countries though a mute question still remains as to how far actionable steps will be taken in the coming years. . 

It's become a catch-22 of our times: the global food system is both a villain and a victim of climate change. Agriculture accounts for almost a quarter of global greenhouse gas emissions, and yet floods, drought, and the planet's increasing climatic variability play with the fate of our food. Continuing on the current climate trajectory will mean a future of profound food insecurity, especially for developing nations.
This week, these concerns have been prominent on the agenda at the COP21 climate talks in Paris. For the first time at a COP conference, agriculture had its own dedicated focus-day, held on Tuesday by the Lima-Paris Action Agenda (LPAA), a partnership established between France and Peru to showcase and strengthen on-the-ground climate action in 2015 and beyond. "For years, agriculture, food systems, including oceans, including forests, have been knocking hard at the door—and now there's movement starting," said David Nabarro, former special representative of food security and nutrition for the United Nations, at the LPAA agriculture press briefing on Tuesday afternoon.
That door should have been yanked open a long time ago, considering that our food systems are due to bear so much of the brunt of climate change. But there are strong signs of progress. The world needs creative solutions if we are to reduce agricultural impact and feed everyone on the planet (an estimated nine billion by 2050)—and some of the best have recently been aired at the talks.
Here are three that caught my eye: each places our global food system squarely on the climate table.

The first step in prioritising food systems is to confront what will happen if we don't. On Tuesday at COP21 the World Food Program and the U.K.'s Met Office Hadley Centre launched a new, interactive mapping tool that predicts, in unprecedented detail, how future climate scenarios could influence food security, especially in the world's developing nations. Based on five years of meteorological and agricultural research, the Food Insecurity and Climate Change Vulnerability Map shows how food security could change at the individual country level, either worsening or improving depending on three variables that users can tweak on the map: time scale (you can choose between the present day, 2050s, 2080s), emissions (low, medium, high), and adaptation (high, low, none).
As a starting point, the map could help countries forecast their food security risk and inform their planning, says Richard Choularton, chief of climate and disaster risk reduction at the World Food Programme. "The results of the analysis can provide some insight into vulnerability at the national level, when the specific factors behind the index are unpacked." For example, in one country road access might emerge as the main limit on food security, in another it might be the variability of rainfall. The map also shows what can be achieved if reduced emissions are paired with increased adaptive measures—like climate-smart agriculture—to make food systems more secure. "What's most important, especially in the context of Paris, is that mitigation or adaption alone is not enough," Choularton says. "We need a very serious combination of both."
The planet's soils naturally hold vast quantities of carbon—two to three times more carbon than the air. Releasing it through unsuitable, soil-degrading agricultural techniques will contribute to climate change and also reduce soil health—but, if we keep more carbon locked in the soil, it has the power to both mitigate climate change and increase agricultural productivity. On Tuesday as part of the Lima-Paris Action Agenda, hundreds of partners joined to launch '4/1000', an initiative designed to increase the storage of carbon in the earth: "If we were to increase the amount of carbon in the soil by just 0.4% then we would compensate entirely for the increase of carbon in the atmosphere—just to show how huge the potential is," says Frank Rijsberman, CEO of the CGIAR Consortium of International Agricultural Centers, one of the partners contributing to the initiative. As part of 4/1000 the CGIAR itself is proposing a $225 million project that aims to increase carbon storage by promoting better farming techniques in developing world agriculture. Methods like agroforestry and reduced soil tillage could keep carbon enclosed in the soil, leading to a 20 percent boost in yields, and in theory offsetting greenhouse gas emissions by 15 percent. The benefits will be three-pronged, says Rijsberman: "We will mitigate greenhouse gas emissions; adapt agriculture to climate change and thus improve food security; and improve ecosystem functioning."
An estimated 1.3 billion tons of food is lost and wasted annually between farm and fork, producing 3.3 Gigatons of carbon dioxide equivalent each year. On Tuesday at COP21, the Food and Agricultural Organization (FAO) and the International Food Policy Research Institute announced that to counter it, they'relaunching a new platform that will encourage G20 member countries, the private sector, and NGOs to pool their resources toward the goal of fighting food waste. Today, that new forum—called the G20 Technical Platform on the Measurement and Reduction of Food Loss and Waste—goes live. The platform is designed to "provide up to date information on policy, strategy and actions for food loss and waste reduction, and share best practices across countries—something which is badly needed," says Anthony Bennett from the Rural Infrastructure and Agro-industries Division at the FAO. G20 member countries—which include China, Brazil, South Africa, the United Kingdom, and the United States—along with other countries, will be encouraged to use the forum to share what works for them in cutting food waste, and what doesn't. As the platform grows, it will also feature a database of low-cost, accessible technologies available to tackle this problem. The hope is that the platform will become a place where countries can unite and ultimately scale up their efforts to reduce the global impact of food waste. These are just three of the many projects worth knowing about: as part of the Lima-Paris Action Agenda, several other food-focused initiatives were launched this week, touching on everything from low-carbon beef to the sustainable management of marine food systems. 

No one should have any quarrel with the contention above that Carbon emission, carbon lock up and enormous food waste taking place around the world are the most critical areas which need to be tackled. Reckless use of fossil fuels, especially by the industrially developed countries for ensuring a luxury life style speaks of a mindset that sacrifices will have to come from poor countries in the form of mandatory reduction of carbon emission though they are on the threshold of exciting economic growth and improvements in their living conditions. Similarly the enormous food waste that is taking place in advanced countries is depriving the poor people of their food needs for survival in the continents of Asia, Africa and South America. Use of these wastes considered enormous go for landfills generating green house gases that contribute to global warming. The responsibility to arrest the catastrophic climate changes rests both with the poor as well as the rich countries of this planet and a give and take approach only can produce tangible results in the coming years.                                                 

V.H.POTTY
http://vhpotty.blogspot.com
http://foodtechupdates.blogspot.com

Sunday, November 23, 2014

BIiopolymers-India's emerging role in global landscape

Plastics, ever since their emergence in early 1900s have literally taken over the day to day lives of human beings as they have become omnipotent in every house hold. Till the end of 18th century man was depending on natural plastic materials like Rubber and a host of other materials available in nature. One of the earliest fully synthetic plastic material viz Bakelite emerged in Belgium finding extensive applications in many spheres of human activity. Partially synthetic plastics based cellulose were made by treating cellulose with nitric acid, followed by dissolving the resulting product in alcohol that yielded a hardened version of plastic. Between 1920 and 1954 emerged a series synthetic plastics based on petroleum sources that include Polystyrene, Polyvinyl chloride, Polyethylene, Polypropylene, Polyethylene terephthalate followed by a number of modifications of these basic materials into speciality products for varied applications.

Interestingly the global production of synthetic plastics has been steadily growing in spite of the scare created by the oil crunch in 1960s and there does not appear to be any pause vis-a-vis the growth of this industry. Environmentalists and social activists are in the forefront to day to curtail the use of plastics and if possible to ban them altogether in the interest of the future of mankind. The "exhaustible" nature of fossil fuels and indestructibility of most plastics which are not biodegradable when disposed off have added new urgency in reducing manufacture and usage of synthetic plastics drastically in coming years. If a recent report regarding the pollution potential of plastics is to be believed, there are more than a billion tons of waste plastics dumped indiscriminately every where across the world, the biggest dumping ground being the water bodies including oceans.  Most plastics take more than 800 years to get degraded left to the elements in nature. 

Of the total production of synthetic plastics in the world, around 15 million tons per year, almost one third is used by the food industry for packing products that require better shelf life. From predominant use of glass bottles and metal cans till about 30 years ago, to day plastics have displaced both these materials almost totally. There are a plethora of reasons for every one to opt for plastics. They are versatile, have wide range of choice for every application, are malleable with high molecular weight, made from cheap petrochemicals, are impervious to water, Besides the food industry, a significant portion of plastics manufactured to day go for making pipes and by the building industry while those manufacturing furniture, automobiles and toys prefer plastics for many reasons. In India almost half the production is used for packaging purpose. One of the biggest constraints of using plastics by the food industry is the indiscriminate use of additives like plasticizers and fillers to make plastics superior in function and attractive to users. Of course there are strict regulations governing use of plastics for food contact applications including migration limitations which give reasonable protection to the consumer from hazards when they are used by the food processors. 

Bioplastics emerged as an alternative to synthetic plastics which may eventually be the answer to the problems posed by the latter. Bioplastics are derived from renewable biomass materials like vegetable fats and oils, starches and microbes. Their USP includes lesser emission of green house gases during production, are biodegradable either aerobically or anaerobically, leachables are not health hazards and they are recyclable. More than 50% of bioplastics produced to day are thermoplastics based on starches while cellulose plastics and poly lactic acid based plastics also are in the market. Poly-3-hydroxy butyrate (PHB), Polyhydroxy alkanoates (PHA), Poly amides (PA) are other bioploymers from which plastic materials of desired properties can be made. Of the 15 million tons (mt) of plastics produced globally, hardly 2.3 mt is accounted for by bioploymers.during 2013 while it is anticipated to increase to 3,5 mt by 2020.  

Polyamides, popularly called  Nylons are the rising star in the plastic horizon and they are widely used for engineering and high performance plastics.  They find extensive applications in various industries such as automotive, consumer goods, electrical & electronics, engineering parts, housings, building & construction, packaging, sporting goods, etc. Probably one of the biggest reasons for its phenomenal rise may be on account of Increased environmental awareness and its credentials as a material that can be made using renewable feed stocks. Its importance also is due to the structural advantage it offers for better performance than the conventionally made engineering thermoplastics. Most of them are bio-based made from Sebacic acid which is derived from Castor oil. Polyamides made from Castor oil such as those branded products like PA 11, PA 12, PA 410, PA 1010, PA 610, EcoPaxx, were launched in 2009 to meet increasing market demand for high performance durable bio-based engineering plastics. To day there are at least half a dozen manufacturers offering a wide range of castor oil based biopolymers with different functional properties. Some of them boast of high performance including high melting point of around 250C, low moisture absorption and excellent resistance to chemical substances. 

Where does India fit into this emerging scenario? India almost monopolizes production of castor oil accounting for more than 65% of global Castor output of 12.5 lakh tons per year. India also supplies 70% of world's requirement of Castor oil though there are 30 countries cultivating this hardy crop. It is rather a paradox that nothing much is done in the country to encourage cultivation of Castor and there is practically no new agronomic development that can raise productivity and quality considerably. If Castor oil fetches prices which are more than double that of other plant oils, government must encourage diverting land from some of the crops like sugarcane to Castor to increase the farmer income considerably.   

V.H.POTTY
http://vhpotty.blogspot.com/
http://foodtechupdates.blogspot.com    

Saturday, April 7, 2012

MEAT EATING AND HUMAN HEALTH-NEW FINDINGS

From time immemorial there has been a persistent question whether human beings are designed to eat meat and it continues to be a raging debate even to day. Looking back in history eating of animal foods got established only after the advent of Christianity while vegetarianism ruled the world during millennium preceding this era. If one probes further back man was transformed into a hunter with omnivorous instincts millions of years ago. Vegans and thorough bred vegetarians swear by the non-essentiality of animal based food products as plant kingdom provide adequate nutrition and health protecting substances for a long life of high quality. In contrast meat foods with high density of nutrients like iron, proteins and many micro nutrients but have the handicap of containing high levels of artery clogging saturated fat. Meat is also devoid the much needed dietary fiber for which humans will have to fall back on plant foods.If these are the stark realities what should be the choice before an intelligent consumer? it may be too much to expect a simple consumer to understand the complexities of the situation and take a life-time decision. Many campaigns and organized programs across the world have not made much of a dent on the extent of meat consumption though there are significant converts to vegetarianism during the last few years. 

One of the tenets of peace on this earth is non-violence, be it against fellow humans or co-inhabitants that live along with them and if this philosophy takes hold on the lives of people, it is possible that one day the whole planet will adopt vegetarianism. But for this to achieve there are a number of interconnected issue which are to be sorted out. Under such an environment what will happen to the trillion dollar industry that piles money killing billions of animals including poultry bird, cows, buffaloes, sheep and goat and pigs? Is it logical to expect these "high muscled" players to give in so easily to the demands made by vegetarian champions? Take the example of a country like India where killing of cows is considered a crime and there are millions of cows with no economic value sought to be protected at enormous cost while the very same cows are slaughtered in millions every day in many countries predominantly beef eating in nature! If governments all over the world are subscribing the view that jungles, forests and wild animals need protection why not the same principle apply to domesticated animals also? A clear dichotomy indeed!

During these days of so much hype generated over climate changes taking place due to many human activities and unlimited burning of fossil fuels, a little noticed aspect is the role meat eaters play in further aggravating the present intolerable situation. There have been high pitch noises coming out of climate control conferences held periodically which any how do not serve any useful purpose with developed countries demanding "sacrifices" from poor developing countries to cut down emissions thus tramping on latter's aspiration to achieve economic prosperity for their citizens. It is unfortunate that these countries where meat eating practice is omnipotent, do not introspect the damage meat consumption is doing for the health of their citizens as well as that of the environment. According knowledgeable experts if Americans can switch over to vegetarian diets, the reduction of green gas emission will be far more substantial than that managed by changing their fossil fuel cars to hybrid versions. It was in 2008 world realized that meat based diets contribute seven times as much green house gas emission as vegetarian diet does!     

According to diet and health experts across the world "a properly planned vegetarian diet is healthy, nutritionally adequate and provides health benefits to prevent diseases" and it has been proved beyond doubt that vegetarian population has lower Body Mass Index, lower cholesterol, lower incidence of blood pressure and hypertension and fewer cases of disorders  Ischemic Heart Disease, renal damage, diabetes and metabolic syndrome. International Vegetarian Union, started in 1908, relentlessly works for convincing people to shun meat foods and become healthy without most of the diseases associated with meat consumption. why is that meat is not good for humans? Because raw meat, it has been confirmed by a number of studies, can reduce the life expectancy by 13%, increase the chances of death from CVD by 18% and that by cancer by 10%. The risk factors get further enhanced if processed meat consumption and its consequence are critically assessed. Processed meat consumption can decrease life expectancy by 20%, by CVD by 21% and cancer by 16%.  

An innocuous piece of news which appeared recently which caught the attention of many critical observers about the loss of sweet sensing ability among some carnivorous animals, domesticated as well as in wild due to gene mutation over a long time which may have some implications in human evolution. The two sweet receptor genes Tas1r2 and Tas1r3 if do not find expression the ability to taste and enjoy sweetness is permanently lost. Disturbingly such mutation has taken its toll due to predominant consumption of meat. What could be the implication of these findings on humans on a long term basis? Is it possible that humans who are non-vegetarians also lose their sweet tasting ability in future over a long period? Or will the drug industry come out with a prescription drug that can make the sweet receptor genes redundant? Can such a situation bring down the incidence of diseases associated with too much consumption of sugar? May not be practical but not impossible!     
V.H.POTTY
http://vhpotty.blogspot.com/
http://foodtechupdates.blogspot.com